I work in a State University where we have laptop carts with up to 24 laptops aboard. Installing the power bricks into the laptop carts and then removing them for use when the laptops need to be used with the AC supply during long sessions, is a real pain. It would be nice to have a central power supply with enough cables to route through the laptop cart to allow charging of the batteries when they are stored. Of course, it would be nice to have a universally used power supply end to do this but, with Propietory companies such as Sony and Dell, getting them to conform will be the most difficult becuase they want to charge premium prices for equipment that they soley want to sell.

If I were a Electonic Technician, I would love to build such a device and I am sure they would sell as there are many many laptop carts in the education market.

If they could build different models with different amounts of cables, this wouuld also be helpful in conference rooms, cubicles where multi users are just accross the walls from each other could all plug in.

Just a thought.